The 34-day hostilities in Lebanon started on July 12, 2006 and continued until August 14, 2006, when the ceasefire entered in force. This report provides an order of magnitude estimate of the cost of environmental degradation caused by the July 2006 hostilities in Lebanon. Chapter 1 introduces the study's objectives, assumptions and valuation methods used. Chapter 2 provides an overview and valuation of the oil spill impacts. Chapters 3-7 estimate the impacts of the hostilities on waste, water, quarries, air and forests.